Component Descriptions
06-237619-001 2-25 April 2020
2-8.2 Pressure Operated Siren
The pressure operated siren provide a mechanical means to generate an audible alarm. The
flow of nitrogen (P/N 90-981574-001) into the siren spins a rotor and creates a high pitch and
high decibel sound. The audible alarm warns personnel of an impending agent discharge and
the need to immediately evacuate the protected area prior to the discharge.
Figure 2-32. Pressure Operated Siren
Nitrogen Pilot
Cylinder
Part Number
Maximum Number of
Sirens per Cylinder
06-129773-001 1
90-101040-200 4
1/2 in. PIPE NIPPLE, 3 in. (76 mm) LONG
PIPE CAP
TYPICAL
DIRT TRAP
PERFORATED HOOD
6-7/8 in.
(175 mm)
5-3/4 in.
(146 mm)
1-9/16 in.
(40 mm)
3-3/4 in.
(95 mm)
4-5/8 in.
(117 mm)
5 in.
(127 mm)
1/2 in. UNION
FILTER
NOZZLE
ROTOR
2-7/16 in. (11 mm)
MOUNTING
HOLES
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